Cumberland Caverns(1437 Cumberland Caverns Rd, McMinnville, TN 37110) 1 hour 30 minutes from Nashville is Cumberland Caverns is a national natural landmark, the second longest cave in Tennessee and makes the list of longest caves in the United States and in the world.

Bell Witch Cave (430 Keysburg Rd, Adams, TN 37010) 1 hour from Nashville. The Bell Witch Cave is a karst cave located in Adams, Tennessee near where the Bell Farm once stood. The cave is approximately 490 feet long. The cave is privately owned, and tours are given during the summer months and in October. Haunted cave too, pretty interesting place to visit.

Mammoth Cave National Park (1 Mammoth Cave Pkwy, Mammoth Cave, KY 42259) 1 hour 30 minutes from Nashville. This is the world’s longest known and most popular cave system, with more than 400 miles explored.

Lost River Cave (2818 Nashville Road, Bowling Green, KY 42101) 1 hour from Nashville is a seven-mile cave system located in Bowling Green, Kentucky. The Lost River originates outside of the cave and flows into it. Lost River Cave contains one of the largest natural entrances in the Eastern U.S. Boat tours are available during the summer in the cave. The river is listed by Ripley’s Believe it or Not as the “Shortest, deepest river in the world” because the blue hole is over 427 feet deep, while the river itself is only 350 feet long.